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. 2016 Jul 1;2(7):e1601001. doi: 10.1126/sciadv.1601001

Fig. 3. Conditions of formation of magnetite in CV chondrules.

Fig. 3

Oxygen fugacity as a function of temperature for a gas of solar composition (C/O = 0.5), the IW buffer, Allende inclusions, and chondrules (as determined from the iron content of olivines in type I chondrules). The fO2 required for forming and stabilizing FeSO melts (SAMs; red circles) lies ≈3 log units higher than the chondrule olivine field. This fO2 is in good agreement with that determined for impact-induced silicate melt–vapor plumes (green field).